<<!DOCTYPE html>
    <html>

    <head>
        <meta charset="utf-8" />
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <title>Page Title</title>
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
        <div id="box">
            <ol>
                <todo-item></todo-item>
                <todo-item></todo-item>
                <todo-item></todo-item>
            </ol>
        </div>

    </head>

    <body>
    </body>
    <script>
        Vue.component('todo-item', {
            props: ['todo'],
            template: ' <li> This is a todo </li> '
        })

        var box = new Vue({
            el: "#box"
        })
    </script>

    </html>